Sift cayenne, salt, and flour together. In a separate bowl, cream butter and cheese together. Gradually add flour mixture and mix thoroughly. Add pecans. Divide dough in half. Roll into logs, 1 1/2 inches x 8 inches. Wrap each log in plastic wrap and refrigerate for up to two weeks or freeze for up to 6 months. To serve: preheat oven to 350 deg f. Grease baking sheets. With a sharp knife, cut logs into 1/4" thick slices. Arrange slices on baking sheets about 1/2 apart. Bake for 15 to 20 minutes or until light golden brown. Remove from sheets and cool completely. Store in airtight containers. Good when served with soups or as hors d'oeuvres.